Heating, air conditioning, and refrigeration mechanics and installers work for plumbing, heating, and air conditioning contractors, as well as in a variety of industries throughout the country, reflecting a widespread dependence on climate-control systems. Some work for refrigeration and air conditioning service and repair shops, schools, and stores that sell heating and air conditioning systems. Local governments, the federal government, hospitals, office buildings, and other organizations that operate large air conditioning, refrigeration, or heating systems also employ these workers. Many technicians are self-employed. Employment of heating, air conditioning, and refrigeration mechanics and installers is projected to increase 21 percent nationally from 2012 through 2022.
Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2014-2015 edition, Heating, Air Conditioning, and Refrigeration Mechanics and Installers.